A filter product frequency wide range bidirectional adjustment structure

Abstract

The invention discloses a large-range bidirectional frequency adjustment structure for a filter product, which belongs to the technical field of filter frequency reduction. The invention discloses a large-range bidirectional frequency adjustment structure for a filter duplexer and multiplexer product, comprising a cover plate, wherein the lower side of the cover plate is detachably connected to a cavity, an adjusting stud is fixedly connected in the cavity, a reverse frequency adjustment double-sided coupling screw is arranged in the adjusting stud, a reverse frequency adjustment double-sided coupling screw hole is arranged on the upper side of the reverse frequency adjustment double-sided coupling screw, a window coupling tuning screw is detachably connected to the cover plate, a window coupling tuning screw is inserted in the reverse frequency adjustment double-sided coupling screw hole, and a locking nut is detachably connected to the lower side of the reverse frequency adjustment double-sided coupling screw. The invention changes the coupling surface into a method of double-sided coupling between the inner hole of the resonant column on the cavity and the reverse customized frequency reduction screw of the cavity, thereby reducing the frequency, reducing the processing cost, and making the processing of products more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of filter frequency reduction, and in particular to a large-range bidirectional frequency adjustment structure for filter products. Background Art

[0002] A filter is a device that filters waves. It can be a filter circuit composed of capacitors, inductors and resistors to effectively remove frequencies at or outside a specific frequency in the power line. It can be used to filter various noise signals, obtain a power signal at a specific frequency, or eliminate a power signal after a specific frequency. In the field of long-term evolution technology, filters such as surface acoustic wave filters or bulk acoustic wave filters are widely used because of their narrow bandwidth, high suppression, and low loss.

[0003] In the design process of conventional filters, duplexers, and multiplexers, due to the lower frequency and appearance limitations, the design often requires the use of flanged resonant columns to meet the customer's low-frequency requirements. This method is widely used now, but this method has disadvantages. Since the flanged resonant column requires a large amount of cutting during the processing, the processing cost is relatively high and the product profit is relatively weak. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that flange resonant columns are needed to obtain low frequencies in the design of filters, duplexers and multiplexers in the prior art, resulting in high processing costs, and a filter product frequency large-range bidirectional adjustment structure is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A filter product frequency wide range bidirectional adjustment structure, comprising:

[0007] A cover plate, wherein the lower side of the cover plate is detachably connected to a cavity, an adjusting stud is fixedly connected to the cavity, a reverse frequency adjustment double-sided coupling screw is arranged in the adjusting stud, a reverse frequency adjustment double-sided coupling screw hole is arranged on the upper side of the reverse frequency adjustment double-sided coupling screw, a window coupling tuning screw is detachably connected to the cover plate, a window coupling tuning screw is inserted in the reverse frequency adjustment double-sided coupling screw hole, a locking nut is detachably connected to the lower side of the reverse frequency adjustment double-sided coupling screw, and the locking nut fixes the reverse frequency adjustment double-sided coupling screw to the cavity.

[0008] Preferably, a forward frequency adjustment screw is arranged in the window coupling tuning screw, and a forward frequency adjustment screw locking nut is detachably connected to the upper side of the forward frequency adjustment screw, and the forward frequency adjustment screw locking nut fixes the forward frequency adjustment screw on the cover plate.

[0009] Preferably, there are 3 adjusting studs, 3 reverse frequency adjustment double-sided coupling screw holes, and 5 forward frequency adjustment screws, and the 5 forward frequency adjustment screws are inserted in the intervals between the 3 reverse frequency adjustment double-sided coupling screw holes and the 3 adjusting studs.

[0010] Preferably, an input connector is provided at the left end of the cavity, and the input connector is detachably connected to the outer wall of the cavity via an input connector fixing screw.

[0011] Preferably, there are four input joint fixing screws in total, and the four input joint fixing screws are evenly distributed at the four corners of the input joint fixing piece.

[0012] Preferably, the input connector is plugged into the cavity through the input hole, an input fixing rod is fixedly connected inside the input connector, an input connecting rod is fixedly connected to the right side of the input fixing rod, and the input connecting rod transmits the signal wave received by the input connector into the cavity.

[0013] Preferably, an output connector is provided at the right end of the cavity, and the output connector is detachably connected to the outer wall of the cavity by an output connector fixing screw.

[0014] Preferably, there are four output connector fixing screws in total, and the four output connector fixing screws are evenly distributed at the four corners of the output connector fixing piece.

[0015] Preferably, the output connector is plugged into the cavity through the output hole, an output fixing rod is fixedly connected inside the output connector, an output connecting rod is fixedly connected to the right side of the output fixing rod, and the output connecting rod transmits the low-frequency signal wave in the cavity to the output connector.

[0016] Preferably, the cover plate is provided with cover plate fixing screws, and the cavity is provided with cavity threaded holes that match the shape and number of the cover plate fixing screws. The cover plate fixing screws are inserted into the cavity threaded holes to fix the cover plate on the cavity. A total of 18 cover plate fixing screws are provided, and the 18 cover plate fixing screws are evenly distributed on the cover plate.

[0017] Compared with the prior art, the present invention provides a filter product frequency wide range bidirectional adjustment structure, which has the following beneficial effects:

[0018] 1. The filter duplexer and multiplexer product has a wide range of bidirectional frequency adjustment structure. It uses the principle of reducing the frequency of the flange resonance column, changes the principle of coupling between the flange surface and the cover surface of the flange resonance column, and changes the coupling surface to the reverse frequency adjustment double-sided coupling screw hole of the adjustment stud on the cavity and the reverse customized frequency reduction screw of the cavity for double-sided coupling, thereby reducing the frequency and reducing the processing cost of the flange resonance column;

[0019] 2. The filter duplexer and multiplexer product has a wide range of bidirectional frequency adjustment structure. While reducing the frequency, it not only reduces the processing cost of the flange resonant column, but also saves the processing time of the cavity, making the processing product more convenient, low-cost, simple to implement and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural stereogram of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0021] Figure 2 This is a front view of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0022] Figure 3 This is a left view of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0023] Figure 4 A top view of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0024] Figure 5 This is an AA cross-sectional view of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0025] Figure 6 This is a partial diagram of the AA section B of a filter product frequency wide range bidirectional adjustment structure proposed by the present invention;

[0026] Figure 7 This is a cross-sectional view of section C of a filter product with a large frequency range and bidirectional adjustment structure proposed by the present invention;

[0027] Figure 8 This is a three-dimensional diagram of the filter product with a wide frequency range and bidirectional adjustment structure proposed by the present invention;

[0028] Fig. 9 This is a top view of the filter product with a wide frequency range and bidirectional adjustment structure proposed by the present invention.

[0029] In the figure: 1. cover plate; 2. cavity; 201. cavity threaded hole; 3. input connector; 301. input fixing rod; 302. input hole; 303. input connecting rod; 4. input connector fixing screw; 5. output connector; 501. output fixing rod; 502. output hole; 503. output connecting rod; 6. output connector fixing screw; 7. forward frequency adjustment screw; 8. forward frequency adjustment screw locking nut; 9. reverse frequency adjustment double-sided coupling screw; 10. locking nut; 11. window coupling tuning screw; 12. cover plate fixing screw; 13. reverse frequency adjustment double-sided coupling screw hole; 14. adjustment stud. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Example:

[0033] Reference Figure 1-9 , a filter product frequency wide range bidirectional adjustment structure, including:

[0034] A cover plate 1, the lower side of the cover plate 1 is detachably connected with a cavity 2, which is convenient for assembly; an adjusting stud 14 is fixedly connected in the cavity 2, a reverse frequency adjustment double-sided coupling screw 9 is arranged in the adjusting stud 14, a reverse frequency adjustment double-sided coupling screw hole 13 is arranged on the upper side of the reverse frequency adjustment double-sided coupling screw 9, a window coupling tuning screw 11 is detachably connected to the cover plate 1, a window coupling tuning screw 11 is inserted in the reverse frequency adjustment double-sided coupling screw hole 13, a locking nut 10 is detachably connected to the lower side of the reverse frequency adjustment double-sided coupling screw 9, the locking nut 10 fixes the reverse frequency adjustment double-sided coupling screw 9 on the cavity 2, and the reverse frequency adjustment double-sided coupling screw 9 is convenient for replacement;

[0035] A forward frequency adjustment screw 7 is arranged in the window coupling tuning screw 11, and a forward frequency adjustment screw locking nut 8 is detachably connected to the upper side of the forward frequency adjustment screw 7, and the forward frequency adjustment screw locking nut 8 fixes the forward frequency adjustment screw 7 on the cover plate 1, so as to facilitate the assembly and replacement of the forward frequency adjustment screw 7, and a total of 3 adjustment studs 14 are arranged, and a total of 3 reverse frequency adjustment double-sided coupling screw holes 13 are arranged, and a total of 5 forward frequency adjustment screws 7 are arranged, and the 5 forward frequency adjustment screws 7 are inserted in the intervals between the 3 reverse frequency adjustment double-sided coupling screw holes 13 and the 3 adjustment studs 14;

[0036] An input connector 3 is provided at the left end of the cavity 2. The input connector 3 is detachably connected to the outer wall of the cavity 2 through an input connector fixing screw 4. There are 4 input connector fixing screws 4 in total. The 4 input connector fixing screws 4 are evenly distributed at the four corners of the input connector 3 fixing part. The four corners are all fixed, which ensures the stability of the connector and reduces the risk of poor signal contact due to loose screws. The input connector 3 is plugged into the cavity 2 through the input hole 302. An input fixing rod 301 is fixedly connected inside the input connector 3. An input connecting rod 303 is fixedly connected to the right side of the input fixing rod 301. The input connecting rod 303 transmits the signal wave received by the input connector 3 into the cavity 2 for signal input;

[0037] An output connector 5 is provided at the right end of the cavity 2. The output connector 5 is detachably connected to the outer wall of the cavity 2 through an output connector fixing screw 6. There are 4 output connector fixing screws 6 in total. The 4 output connector fixing screws 6 are evenly distributed at the four corners of the output connector 5 fixing part. The four corners are all fixed, which ensures the stability of the connector and reduces the risk of poor signal contact due to loose screws. The output connector 5 is plugged into the cavity 2 through the output hole 502. An output fixing rod 501 is fixedly connected inside the output connector 5. An output connecting rod 503 is fixedly connected to the right side of the output fixing rod 501. The output connecting rod 503 transmits the low-frequency signal wave in the cavity 2 to the output connector 5 for signal transmission;

[0038] The cover plate 1 is provided with a cover plate fixing screw 12, and the cavity 2 is provided with a cavity threaded hole 201 that matches the shape and quantity of the cover plate fixing screw 12. The cover plate fixing screw 12 is inserted into the cavity threaded hole 201 to fix the cover plate 1 on the cavity 2. A total of 18 cover plate fixing screws 12 are provided, and the 18 cover plate fixing screws 12 are evenly distributed on the cover plate 1, thereby ensuring the stability of the cover plate 1 and reducing the risk of poor signal contact due to loose screws;

[0039] In the present invention, by utilizing the principle of reducing the frequency of the flange resonant column, the principle of coupling between the flange surface of the flange resonant column and the cover plate 1 is changed, and the coupling surface is changed to a method of adjusting the inner hole of the stud 14 on the cavity 2 and reversely customizing the frequency reduction screw of the cavity 2 for double-sided coupling, thereby reducing the frequency, saving the processing time of the cavity, reducing the processing cost of the flange resonant column, and improving efficiency.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter product frequency wide range bidirectional adjustment structure, characterized in that: include: A cover plate (1), wherein the lower side of the cover plate (1) is detachably connected to a cavity (2), an adjusting stud (14) is fixedly connected inside the cavity (2), a reverse frequency adjustment double-sided coupling screw (9) is arranged inside the adjusting stud (14), a reverse frequency adjustment double-sided coupling screw hole (13) is arranged on the upper side of the reverse frequency adjustment double-sided coupling screw (9), a window coupling tuning screw (11) is detachably connected to the cover plate (1), a window coupling tuning screw (11) is inserted into the reverse frequency adjustment double-sided coupling screw hole (13), a locking nut (10) is detachably connected to the lower side of the reverse frequency adjustment double-sided coupling screw (9), and the locking nut (10) fixes the reverse frequency adjustment double-sided coupling screw (9) on the cavity (2); An input connector (3) is provided at the left end of the cavity (2), and the input connector (3) is detachably connected to the outer wall of the cavity (2) via an input connector fixing screw (4); A total of four input joint fixing screws (4) are provided, and the four input joint fixing screws (4) are evenly distributed at the four corners of the input joint (3) fixing part; The input connector (3) is plugged into the cavity (2) through the input hole (302); an input fixing rod (301) is fixedly connected inside the input connector (3); an input connecting rod (303) is fixedly connected to the right side of the input fixing rod (301); the input connecting rod (303) transmits the signal wave received by the input connector (3) into the cavity (2).

2. A filter product frequency wide range bidirectional adjustment structure according to claim 1, characterized in that: The window coupling tuning screw (11) comprises a forward frequency adjustment screw (7), the upper side of which is detachably connected to a forward frequency adjustment screw locking nut (8), and the forward frequency adjustment screw locking nut (8) fixes the forward frequency adjustment screw (7) on the cover plate (1).

3. A filter product frequency wide range bidirectional adjustment structure according to claim 2, characterized in that: There are three adjusting screws (14) in total, three reverse frequency adjusting double-sided coupling screw holes (13) in total, and five forward frequency adjusting screw rods (7) in total. The five forward frequency adjusting screw rods (7) are inserted into the intervals between the three reverse frequency adjusting double-sided coupling screw holes (13) and the three adjusting screws (14).

4. The filter product frequency wide range bidirectional adjustment structure according to claim 1 is characterized in that: An output connector (5) is provided at the right end of the cavity (2), and the output connector (5) is detachably connected to the outer wall of the cavity (2) via an output connector fixing screw (6).

5. A filter product frequency wide range bidirectional adjustment structure according to claim 4, characterized in that: A total of four output connector fixing screws (6) are provided, and the four output connector fixing screws (6) are evenly distributed at the four corners of the output connector (5) fixing piece.

6. A filter product frequency wide range bidirectional adjustment structure according to claim 4, characterized in that: The output connector (5) is plugged into the cavity (2) through the output hole (502); an output fixing rod (501) is fixedly connected inside the output connector (5); an output connecting rod (503) is fixedly connected to the right side of the output fixing rod (501); the output connecting rod (503) transmits the low-frequency signal wave in the cavity (2) to the output connector (5).

7. The filter product frequency wide range bidirectional adjustment structure according to claim 1 is characterized in that: The cover plate (1) is provided with a cover plate fixing screw (12), and the cavity (2) is provided with a cavity threaded hole (201) whose shape and number match those of the cover plate fixing screw (12). The cover plate fixing screw (12) is inserted into the cavity threaded hole (201) to fix the cover plate (1) on the cavity (2), and a total of 18 cover plate fixing screws (12) are provided, and the 18 cover plate fixing screws (12) are evenly distributed on the cover plate (1).

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